摘要
为研究大型风电场接入对电力系统动态稳定的影响,风电场的动态出力特性等值建模方法成为关键。在分析双馈风力发电机组数学模型基础上,基于明确的物理意义,利用容量加权平均法,对变速恒频双馈型风电场中风力机、发电机及其控制系统进行了等值,并利用单纯形法对控制系统等值参数进行寻优,得到了风电场的动态出力特性模型。基于PSCAD/EMTDC软件平台,分别建立了风电场25台风力发电机组的全仿真模型和动态等值模型,仿真比较了两者的动态出力特性。仿真结果表明,所提的等值建模方法是可行的。
For the study on the influence of the access of large wind farms on the power system stability,the dynamic output characteristic modeling method of wind farm becomes the key.First,on the base of the mathematical model of single DFIG and the specific physical meaning,this paper uses the weighted average method to separately aggregate the wind turbine,generator and the control system of the doubly fed induction generators.Then by simplex searching,control parameters are adjusted and the dynamic output characteristic model is obtained.Finally,the complete model and dynamic equivalent model of wind farm which contains 25 wind turbine generators are established in the PSCAD/EMTDC environment and are compared with each other the dynamic output characteristic.Results show that method is demonstrated to be effective.
出处
《电力科学与工程》
2011年第12期7-11,16,共6页
Electric Power Science and Engineering
关键词
风电场
双馈风力发电机组
出力特性
动态模型
等值
wind farm
doubly fed induction generators
output characteristic
dynamic model
equivalence
